Santos coach Mauricy Ramalho has questioned whether Real Madrid would be the best move for Neymar.
Neymar is a top target for Real and Chelsea.
"I have a bit of fear for Neymar in Madrid and that the same thing happens to him that happened to Kaka," he said.
"Madrid is very different from Santos. I do not know if he will be free on the field, because Jose Mourinho likes much tactical work, he does not leave you to play.
"I have a little doubt that relationship for Neymar at Madrid."
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